ssl/ssl_ciph.c

   1 /* ssl/ssl_ciph.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111 /* ====================================================================
 112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 113  * ECC cipher suite support in OpenSSL originally developed by
 114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 115  */
 116 /* ====================================================================
 117  * Copyright 2005 Nokia. All rights reserved.
 118  *
 119  * The portions of the attached software ("Contribution") is developed by
 120  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 121  * license.
 122  *
 123  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 124  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 125  * support (see RFC 4279) to OpenSSL.
 126  *
 127  * No patent licenses or other rights except those expressly stated in
 128  * the OpenSSL open source license shall be deemed granted or received
 129  * expressly, by implication, estoppel, or otherwise.
 130  *
 131  * No assurances are provided by Nokia that the Contribution does not
 132  * infringe the patent or other intellectual property rights of any third
 133  * party or that the license provides you with all the necessary rights
 134  * to make use of the Contribution.
 135  *
 136  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 137  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 138  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 139  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 140  * OTHERWISE.
 141  */
 142
 143 #include <stdio.h>
 144 #include <openssl/objects.h>
 145 #include <openssl/comp.h>
 146 #include <openssl/engine.h>
 147 #include "ssl_locl.h"
 148
 149 #define SSL_ENC_DES_IDX         0
 150 #define SSL_ENC_3DES_IDX        1
 151 #define SSL_ENC_RC4_IDX         2
 152 #define SSL_ENC_RC2_IDX         3
 153 #define SSL_ENC_IDEA_IDX        4
 154 #define SSL_ENC_NULL_IDX        5
 155 #define SSL_ENC_AES128_IDX      6
 156 #define SSL_ENC_AES256_IDX      7
 157 #define SSL_ENC_CAMELLIA128_IDX 8
 158 #define SSL_ENC_CAMELLIA256_IDX 9
 159 #define SSL_ENC_GOST89_IDX      10
 160 #define SSL_ENC_SEED_IDX        11
 161 #define SSL_ENC_NUM_IDX         12
 162
 163
 164 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
 165         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
 166         };
 167
 168 #define SSL_COMP_NULL_IDX       0
 169 #define SSL_COMP_ZLIB_IDX       1
 170 #define SSL_COMP_NUM_IDX        2
 171
 172 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
 173
 174 #define SSL_MD_MD5_IDX  0
 175 #define SSL_MD_SHA1_IDX 1
 176 #define SSL_MD_GOST94_IDX 2
 177 #define SSL_MD_GOST89MAC_IDX 3
 178 /*Constant SSL_MAX_DIGEST equal to size of digests array should be
 179  * defined in the
 180  * ssl_locl.h */
 181 #define SSL_MD_NUM_IDX  SSL_MAX_DIGEST
 182 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
 183         NULL,NULL,NULL,NULL
 184         };
 185 /* PKEY_TYPE for GOST89MAC is known in advance, but, because
 186  * implementation is engine-provided, we'll fill it only if
 187  * corresponding EVP_PKEY_METHOD is found
 188  */
 189 static int  ssl_mac_pkey_id[SSL_MD_NUM_IDX]={
 190         EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef
 191         };
 192
 193 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={
 194         0,0,0,0
 195         };
 196
 197 static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX]={
 198         SSL_HANDSHAKE_MAC_MD5,SSL_HANDSHAKE_MAC_SHA,
 199         SSL_HANDSHAKE_MAC_GOST94,0
 200         };
 201
 202 #define CIPHER_ADD      1
 203 #define CIPHER_KILL     2
 204 #define CIPHER_DEL      3
 205 #define CIPHER_ORD      4
 206 #define CIPHER_SPECIAL  5
 207
 208 typedef struct cipher_order_st
 209         {
 210         SSL_CIPHER *cipher;
 211         int active;
 212         int dead;
 213         struct cipher_order_st *next,*prev;
 214         } CIPHER_ORDER;
 215
 216 static const SSL_CIPHER cipher_aliases[]={
 217         /* "ALL" doesn't include eNULL (must be specifically enabled) */
 218         {0,SSL_TXT_ALL,0,     0,0,~SSL_eNULL,0,0,0,0,0,0},
 219         /* "COMPLEMENTOFALL" */
 220         {0,SSL_TXT_CMPALL,0,  0,0,SSL_eNULL,0,0,0,0,0,0},
 221
 222         /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
 223         {0,SSL_TXT_CMPDEF,0,  SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
 224
 225         /* key exchange aliases
 226          * (some of those using only a single bit here combine
 227          * multiple key exchange algs according to the RFCs,
 228          * e.g. kEDH combines DHE_DSS and DHE_RSA) */
 229         {0,SSL_TXT_kRSA,0,    SSL_kRSA,  0,0,0,0,0,0,0,0},
 230
 231         {0,SSL_TXT_kDHr,0,    SSL_kDHr,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 232         {0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 233         {0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 234         {0,SSL_TXT_kEDH,0,    SSL_kEDH,  0,0,0,0,0,0,0,0},
 235         {0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
 236
 237         {0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},
 238
 239         {0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
 240         {0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
 241         {0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
 242         {0,SSL_TXT_kEECDH,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
 243         {0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
 244
 245         {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},
 246         {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0},
 247
 248         /* server authentication aliases */
 249         {0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
 250         {0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
 251         {0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
 252         {0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
 253         {0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
 254         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 255         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
 256         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
 257         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
 258         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
 259         {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0},
 260         {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0},
 261         {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0},
 262
 263         /* aliases combining key exchange and server authentication */
 264         {0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
 265         {0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
 266         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
 267         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
 268         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
 269         {0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
 270         {0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
 271         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
 272
 273
 274         /* symmetric encryption aliases */
 275         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
 276         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
 277         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
 278         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
 279         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
 280         {0,SSL_TXT_SEED,0,    0,0,SSL_SEED,  0,0,0,0,0,0},
 281         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
 282         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128,0,0,0,0,0,0},
 283         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256,0,0,0,0,0,0},
 284         {0,SSL_TXT_AES,0,     0,0,SSL_AES128|SSL_AES256,0,0,0,0,0,0},
 285         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
 286         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
 287         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
 288
 289         /* MAC aliases */
 290         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
 291         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
 292         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
 293         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
 294         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
 295
 296         /* protocol version aliases */
 297         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
 298         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
 299         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
 300
 301         /* export flag */
 302         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
 303         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
 304
 305         /* strength classes */
 306         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
 307         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
 308         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
 309         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
 310         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
 311         };
 312 /* Search for public key algorithm with given name and
 313  * return its pkey_id if it is available. Otherwise return 0
 314  */
 315 static int get_optional_pkey_id(const char *pkey_name)
 316         {
 317         const EVP_PKEY_ASN1_METHOD *ameth;
 318         ENGINE *tmpeng = NULL;
 319         int pkey_id=0;
 320         ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
 321         if (ameth)
 322                 {
 323                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 324                 }
 325         if (tmpeng) ENGINE_finish(tmpeng);
 326         return pkey_id;
 327         }
 328
 329 void ssl_load_ciphers(void)
 330         {
 331         ssl_cipher_methods[SSL_ENC_DES_IDX]=
 332                 EVP_get_cipherbyname(SN_des_cbc);
 333         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
 334                 EVP_get_cipherbyname(SN_des_ede3_cbc);
 335         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
 336                 EVP_get_cipherbyname(SN_rc4);
 337         ssl_cipher_methods[SSL_ENC_RC2_IDX]=
 338                 EVP_get_cipherbyname(SN_rc2_cbc);
 339 #ifndef OPENSSL_NO_IDEA
 340         ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
 341                 EVP_get_cipherbyname(SN_idea_cbc);
 342 #else
 343         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
 344 #endif
 345         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
 346           EVP_get_cipherbyname(SN_aes_128_cbc);
 347         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
 348           EVP_get_cipherbyname(SN_aes_256_cbc);
 349         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
 350           EVP_get_cipherbyname(SN_camellia_128_cbc);
 351         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
 352           EVP_get_cipherbyname(SN_camellia_256_cbc);
 353         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
 354           EVP_get_cipherbyname(SN_gost89_cnt);
 355         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
 356           EVP_get_cipherbyname(SN_seed_cbc);
 357
 358         ssl_digest_methods[SSL_MD_MD5_IDX]=
 359                 EVP_get_digestbyname(SN_md5);
 360         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
 361                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
 362         ssl_digest_methods[SSL_MD_SHA1_IDX]=
 363                 EVP_get_digestbyname(SN_sha1);
 364         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
 365                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
 366         ssl_digest_methods[SSL_MD_GOST94_IDX]=
 367                 EVP_get_digestbyname(SN_id_GostR3411_94);
 368         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
 369                 {
 370                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
 371                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
 372                 }
 373         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
 374                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
 375                 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
 376                 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
 377                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
 378                 }
 379
 380         }
 381 #ifndef OPENSSL_NO_COMP
 382
 383 static int sk_comp_cmp(const SSL_COMP * const *a,
 384                         const SSL_COMP * const *b)
 385         {
 386         return((*a)->id-(*b)->id);
 387         }
 388
 389 static void load_builtin_compressions(void)
 390         {
 391         int got_write_lock = 0;
 392
 393         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
 394         if (ssl_comp_methods == NULL)
 395                 {
 396                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 397                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 398                 got_write_lock = 1;
 399
 400                 if (ssl_comp_methods == NULL)
 401                         {
 402                         SSL_COMP *comp = NULL;
 403
 404                         MemCheck_off();
 405                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
 406                         if (ssl_comp_methods != NULL)
 407                                 {
 408                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
 409                                 if (comp != NULL)
 410                                         {
 411                                         comp->method=COMP_zlib();
 412                                         if (comp->method
 413                                                 && comp->method->type == NID_undef)
 414                                                 OPENSSL_free(comp);
 415                                         else
 416                                                 {
 417                                                 comp->id=SSL_COMP_ZLIB_IDX;
 418                                                 comp->name=comp->method->name;
 419                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
 420                                                 }
 421                                         }
 422                                 }
 423                         MemCheck_on();
 424                         }
 425                 }
 426
 427         if (got_write_lock)
 428                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 429         else
 430                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 431         }
 432 #endif
 433
 434 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
 435              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp)
 436         {
 437         int i;
 438         SSL_CIPHER *c;
 439
 440         c=s->cipher;
 441         if (c == NULL) return(0);
 442         if (comp != NULL)
 443                 {
 444                 SSL_COMP ctmp;
 445 #ifndef OPENSSL_NO_COMP
 446                 load_builtin_compressions();
 447 #endif
 448
 449                 *comp=NULL;
 450                 ctmp.id=s->compress_meth;
 451                 if (ssl_comp_methods != NULL)
 452                         {
 453                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
 454                         if (i >= 0)
 455                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
 456                         else
 457                                 *comp=NULL;
 458                         }
 459                 }
 460
 461         if ((enc == NULL) || (md == NULL)) return(0);
 462
 463         switch (c->algorithm_enc)
 464                 {
 465         case SSL_DES:
 466                 i=SSL_ENC_DES_IDX;
 467                 break;
 468         case SSL_3DES:
 469                 i=SSL_ENC_3DES_IDX;
 470                 break;
 471         case SSL_RC4:
 472                 i=SSL_ENC_RC4_IDX;
 473                 break;
 474         case SSL_RC2:
 475                 i=SSL_ENC_RC2_IDX;
 476                 break;
 477         case SSL_IDEA:
 478                 i=SSL_ENC_IDEA_IDX;
 479                 break;
 480         case SSL_eNULL:
 481                 i=SSL_ENC_NULL_IDX;
 482                 break;
 483         case SSL_AES128:
 484                 i=SSL_ENC_AES128_IDX;
 485                 break;
 486         case SSL_AES256:
 487                 i=SSL_ENC_AES256_IDX;
 488                 break;
 489         case SSL_CAMELLIA128:
 490                 i=SSL_ENC_CAMELLIA128_IDX;
 491                 break;
 492         case SSL_CAMELLIA256:
 493                 i=SSL_ENC_CAMELLIA256_IDX;
 494                 break;
 495         case SSL_eGOST2814789CNT:
 496                 i=SSL_ENC_GOST89_IDX;
 497                 break;
 498         case SSL_SEED:
 499                 i=SSL_ENC_SEED_IDX;
 500                 break;
 501         default:
 502                 i= -1;
 503                 break;
 504                 }
 505
 506         if ((i < 0) || (i > SSL_ENC_NUM_IDX))
 507                 *enc=NULL;
 508         else
 509                 {
 510                 if (i == SSL_ENC_NULL_IDX)
 511                         *enc=EVP_enc_null();
 512                 else
 513                         *enc=ssl_cipher_methods[i];
 514                 }
 515
 516         switch (c->algorithm_mac)
 517                 {
 518         case SSL_MD5:
 519                 i=SSL_MD_MD5_IDX;
 520                 break;
 521         case SSL_SHA1:
 522                 i=SSL_MD_SHA1_IDX;
 523                 break;
 524         case SSL_GOST94:
 525                 i = SSL_MD_GOST94_IDX;
 526                 break;
 527         case SSL_GOST89MAC:
 528                 i = SSL_MD_GOST89MAC_IDX;
 529                 break;
 530         default:
 531                 i= -1;
 532                 break;
 533                 }
 534         if ((i < 0) || (i > SSL_MD_NUM_IDX))
 535         {
 536                 *md=NULL;
 537                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
 538                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
 539
 540         }
 541         else
 542         {
 543                 *md=ssl_digest_methods[i];
 544                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
 545                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
 546         }
 547
 548         if ((*enc != NULL) && (*md != NULL) && (!mac_pkey_type||*mac_pkey_type != NID_undef))
 549                 return(1);
 550         else
 551                 return(0);
 552         }
 553
 554 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
 555 {
 556         if (idx <0||idx>=SSL_MD_NUM_IDX)
 557                 {
 558                 return 0;
 559                 }
 560         if (ssl_handshake_digest_flag[idx]==0) return 0;
 561         *mask = ssl_handshake_digest_flag[idx];
 562         *md = ssl_digest_methods[idx];
 563         return 1;
 564 }
 565
 566 #define ITEM_SEP(a) \
 567         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
 568
 569 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 570              CIPHER_ORDER **tail)
 571         {
 572         if (curr == *tail) return;
 573         if (curr == *head)
 574                 *head=curr->next;
 575         if (curr->prev != NULL)
 576                 curr->prev->next=curr->next;
 577         if (curr->next != NULL)
 578                 curr->next->prev=curr->prev;
 579         (*tail)->next=curr;
 580         curr->prev= *tail;
 581         curr->next=NULL;
 582         *tail=curr;
 583         }
 584
 585 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 586              CIPHER_ORDER **tail)
 587         {
 588         if (curr == *head) return;
 589         if (curr == *tail)
 590                 *tail=curr->prev;
 591         if (curr->next != NULL)
 592                 curr->next->prev=curr->prev;
 593         if (curr->prev != NULL)
 594                 curr->prev->next=curr->next;
 595         (*head)->prev=curr;
 596         curr->next= *head;
 597         curr->prev=NULL;
 598         *head=curr;
 599         }
 600
 601 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
 602         {
 603         *mkey = 0;
 604         *auth = 0;
 605         *enc = 0;
 606         *mac = 0;
 607         *ssl = 0;
 608
 609 #ifdef OPENSSL_NO_RSA
 610         *mkey |= SSL_kRSA;
 611         *auth |= SSL_aRSA;
 612 #endif
 613 #ifdef OPENSSL_NO_DSA
 614         *auth |= SSL_aDSS;
 615 #endif
 616         *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
 617         *auth |= SSL_aDH;
 618 #ifdef OPENSSL_NO_DH
 619         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
 620         *auth |= SSL_aDH;
 621 #endif
 622 #ifdef OPENSSL_NO_KRB5
 623         *mkey |= SSL_kKRB5;
 624         *auth |= SSL_aKRB5;
 625 #endif
 626 #ifdef OPENSSL_NO_ECDSA
 627         *auth |= SSL_aECDSA;
 628 #endif
 629 #ifdef OPENSSL_NO_ECDH
 630         *mkey |= SSL_kECDHe|SSL_kECDHr;
 631         *auth |= SSL_aECDH;
 632 #endif
 633 #ifdef OPENSSL_NO_PSK
 634         *mkey |= SSL_kPSK;
 635         *auth |= SSL_aPSK;
 636 #endif
 637         /* Check for presence of GOST 34.10 algorithms, and if they
 638          * do not present, disable  appropriate auth and key exchange */
 639         if (!get_optional_pkey_id("gost94")) {
 640                 *auth |= SSL_aGOST94;
 641         }
 642         if (!get_optional_pkey_id("gost2001")) {
 643                 *auth |= SSL_aGOST01;
 644         }
 645         /* Disable GOST key exchange if no GOST signature algs are available * */
 646         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
 647                 *mkey |= SSL_kGOST;
 648         }
 649 #ifdef SSL_FORBID_ENULL
 650         *enc |= SSL_eNULL;
 651 #endif
 652
 653
 654
 655         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
 656         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
 657         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
 658         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
 659         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
 660         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
 661         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
 662         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
 663         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
 664         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
 665         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
 666
 667         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
 668         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
 669         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
 670         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
 671
 672         }
 673
 674 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
 675                 int num_of_ciphers,
 676                 unsigned long disabled_mkey, unsigned long disabled_auth,
 677                 unsigned long disabled_enc, unsigned long disabled_mac,
 678                 unsigned long disabled_ssl,
 679                 CIPHER_ORDER *co_list,
 680                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 681         {
 682         int i, co_list_num;
 683         SSL_CIPHER *c;
 684
 685         /*
 686          * We have num_of_ciphers descriptions compiled in, depending on the
 687          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
 688          * These will later be sorted in a linked list with at most num
 689          * entries.
 690          */
 691
 692         /* Get the initial list of ciphers */
 693         co_list_num = 0;        /* actual count of ciphers */
 694         for (i = 0; i < num_of_ciphers; i++)
 695                 {
 696                 c = ssl_method->get_cipher(i);
 697                 /* drop those that use any of that is not available */
 698                 if ((c != NULL) && c->valid &&
 699                     !(c->algorithm_mkey & disabled_mkey) &&
 700                     !(c->algorithm_auth & disabled_auth) &&
 701                     !(c->algorithm_enc & disabled_enc) &&
 702                     !(c->algorithm_mac & disabled_mac) &&
 703                     !(c->algorithm_ssl & disabled_ssl))
 704                         {
 705                         co_list[co_list_num].cipher = c;
 706                         co_list[co_list_num].next = NULL;
 707                         co_list[co_list_num].prev = NULL;
 708                         co_list[co_list_num].active = 0;
 709                         co_list_num++;
 710 #ifdef KSSL_DEBUG
 711                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
 712 #endif  /* KSSL_DEBUG */
 713                         /*
 714                         if (!sk_push(ca_list,(char *)c)) goto err;
 715                         */
 716                         }
 717                 }
 718
 719         /*
 720          * Prepare linked list from list entries
 721          */
 722         if (co_list_num > 0)
 723                 {
 724                 co_list[0].prev = NULL;
 725
 726                 if (co_list_num > 1)
 727                         {
 728                         co_list[0].next = &co_list[1];
 729
 730                         for (i = 1; i < co_list_num - 1; i++)
 731                                 {
 732                                 co_list[i].prev = &co_list[i - 1];
 733                                 co_list[i].next = &co_list[i + 1];
 734                                 }
 735
 736                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
 737                         }
 738
 739                 co_list[co_list_num - 1].next = NULL;
 740
 741                 *head_p = &co_list[0];
 742                 *tail_p = &co_list[co_list_num - 1];
 743                 }
 744         }
 745
 746 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
 747                         int num_of_group_aliases,
 748                         unsigned long disabled_mkey, unsigned long disabled_auth,
 749                         unsigned long disabled_enc, unsigned long disabled_mac,
 750                         unsigned long disabled_ssl,
 751                         CIPHER_ORDER *head)
 752         {
 753         CIPHER_ORDER *ciph_curr;
 754         SSL_CIPHER **ca_curr;
 755         int i;
 756         unsigned long mask_mkey = ~disabled_mkey;
 757         unsigned long mask_auth = ~disabled_auth;
 758         unsigned long mask_enc = ~disabled_enc;
 759         unsigned long mask_mac = ~disabled_mac;
 760         unsigned long mask_ssl = ~disabled_ssl;
 761
 762         /*
 763          * First, add the real ciphers as already collected
 764          */
 765         ciph_curr = head;
 766         ca_curr = ca_list;
 767         while (ciph_curr != NULL)
 768                 {
 769                 *ca_curr = ciph_curr->cipher;
 770                 ca_curr++;
 771                 ciph_curr = ciph_curr->next;
 772                 }
 773
 774         /*
 775          * Now we add the available ones from the cipher_aliases[] table.
 776          * They represent either one or more algorithms, some of which
 777          * in any affected category must be supported (set in enabled_mask),
 778          * or represent a cipher strength value (will be added in any case because algorithms=0).
 779          */
 780         for (i = 0; i < num_of_group_aliases; i++)
 781                 {
 782                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
 783                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
 784                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
 785                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
 786                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
 787
 788                 if (algorithm_mkey)
 789                         if ((algorithm_mkey & mask_mkey) == 0)
 790                                 continue;
 791
 792                 if (algorithm_auth)
 793                         if ((algorithm_auth & mask_auth) == 0)
 794                                 continue;
 795
 796                 if (algorithm_enc)
 797                         if ((algorithm_enc & mask_enc) == 0)
 798                                 continue;
 799
 800                 if (algorithm_mac)
 801                         if ((algorithm_mac & mask_mac) == 0)
 802                                 continue;
 803
 804                 if (algorithm_ssl)
 805                         if ((algorithm_ssl & mask_ssl) == 0)
 806                                 continue;
 807
 808                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
 809                 ca_curr++;
 810                 }
 811
 812         *ca_curr = NULL;        /* end of list */
 813         }
 814
 815 static void ssl_cipher_apply_rule(unsigned long cipher_id,
 816                 unsigned long alg_mkey, unsigned long alg_auth,
 817                 unsigned long alg_enc, unsigned long alg_mac,
 818                 unsigned long alg_ssl,
 819                 unsigned long algo_strength,
 820                 int rule, int strength_bits,
 821                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 822         {
 823         CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
 824         SSL_CIPHER *cp;
 825         int reverse = 0;
 826
 827 #ifdef CIPHER_DEBUG
 828         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
 829                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
 830 #endif
 831
 832         if (rule == CIPHER_DEL)
 833                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
 834
 835         head = *head_p;
 836         tail = *tail_p;
 837
 838         if (reverse)
 839                 {
 840                 curr = tail;
 841                 last = head;
 842                 }
 843         else
 844                 {
 845                 curr = head;
 846                 last = tail;
 847                 }
 848
 849         curr2 = curr;
 850         for (;;)
 851                 {
 852                 if ((curr == NULL) || (curr == last)) break;
 853                 curr = curr2;
 854                 curr2 = reverse ? curr->prev : curr->next;
 855
 856                 cp = curr->cipher;
 857
 858                 /*
 859                  * Selection criteria is either the value of strength_bits
 860                  * or the algorithms used.
 861                  */
 862                 if (strength_bits >= 0)
 863                         {
 864                         if (strength_bits != cp->strength_bits)
 865                                 continue;
 866                         }
 867                 else
 868                         {
 869 #ifdef CIPHER_DEBUG
 870                         printf("\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n", cp->name, cp->algorithm_mkey, cp->algorithm_auth, cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl, cp->algo_strength);
 871 #endif
 872
 873                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
 874                                 continue;
 875                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
 876                                 continue;
 877                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
 878                                 continue;
 879                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
 880                                 continue;
 881                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
 882                                 continue;
 883                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
 884                                 continue;
 885                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
 886                                 continue;
 887                         }
 888
 889 #ifdef CIPHER_DEBUG
 890                 printf("Action = %d\n", rule);
 891 #endif
 892
 893                 /* add the cipher if it has not been added yet. */
 894                 if (rule == CIPHER_ADD)
 895                         {
 896                         /* reverse == 0 */
 897                         if (!curr->active)
 898                                 {
 899                                 ll_append_tail(&head, curr, &tail);
 900                                 curr->active = 1;
 901                                 }
 902                         }
 903                 /* Move the added cipher to this location */
 904                 else if (rule == CIPHER_ORD)
 905                         {
 906                         /* reverse == 0 */
 907                         if (curr->active)
 908                                 {
 909                                 ll_append_tail(&head, curr, &tail);
 910                                 }
 911                         }
 912                 else if (rule == CIPHER_DEL)
 913                         {
 914                         /* reverse == 1 */
 915                         if (curr->active)
 916                                 {
 917                                 /* most recently deleted ciphersuites get best positions
 918                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
 919                                  * works in reverse to maintain the order) */
 920                                 ll_append_head(&head, curr, &tail);
 921                                 curr->active = 0;
 922                                 }
 923                         }
 924                 else if (rule == CIPHER_KILL)
 925                         {
 926                         /* reverse == 0 */
 927                         if (head == curr)
 928                                 head = curr->next;
 929                         else
 930                                 curr->prev->next = curr->next;
 931                         if (tail == curr)
 932                                 tail = curr->prev;
 933                         curr->active = 0;
 934                         if (curr->next != NULL)
 935                                 curr->next->prev = curr->prev;
 936                         if (curr->prev != NULL)
 937                                 curr->prev->next = curr->next;
 938                         curr->next = NULL;
 939                         curr->prev = NULL;
 940                         }
 941                 }
 942
 943         *head_p = head;
 944         *tail_p = tail;
 945         }
 946
 947 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
 948                                     CIPHER_ORDER **tail_p)
 949         {
 950         int max_strength_bits, i, *number_uses;
 951         CIPHER_ORDER *curr;
 952
 953         /*
 954          * This routine sorts the ciphers with descending strength. The sorting
 955          * must keep the pre-sorted sequence, so we apply the normal sorting
 956          * routine as '+' movement to the end of the list.
 957          */
 958         max_strength_bits = 0;
 959         curr = *head_p;
 960         while (curr != NULL)
 961                 {
 962                 if (curr->active &&
 963                     (curr->cipher->strength_bits > max_strength_bits))
 964                     max_strength_bits = curr->cipher->strength_bits;
 965                 curr = curr->next;
 966                 }
 967
 968         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
 969         if (!number_uses)
 970                 {
 971                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
 972                 return(0);
 973                 }
 974         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
 975
 976         /*
 977          * Now find the strength_bits values actually used
 978          */
 979         curr = *head_p;
 980         while (curr != NULL)
 981                 {
 982                 if (curr->active)
 983                         number_uses[curr->cipher->strength_bits]++;
 984                 curr = curr->next;
 985                 }
 986         /*
 987          * Go through the list of used strength_bits values in descending
 988          * order.
 989          */
 990         for (i = max_strength_bits; i >= 0; i--)
 991                 if (number_uses[i] > 0)
 992                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
 993
 994         OPENSSL_free(number_uses);
 995         return(1);
 996         }
 997
 998 static int ssl_cipher_process_rulestr(const char *rule_str,
 999                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1000                 SSL_CIPHER **ca_list)
1001         {
1002         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1003         const char *l, *start, *buf;
1004         int j, multi, found, rule, retval, ok, buflen;
1005         unsigned long cipher_id = 0;
1006         char ch;
1007
1008         retval = 1;
1009         l = rule_str;
1010         for (;;)
1011                 {
1012                 ch = *l;
1013
1014                 if (ch == '\0')
1015                         break;          /* done */
1016                 if (ch == '-')
1017                         { rule = CIPHER_DEL; l++; }
1018                 else if (ch == '+')
1019                         { rule = CIPHER_ORD; l++; }
1020                 else if (ch == '!')
1021                         { rule = CIPHER_KILL; l++; }
1022                 else if (ch == '@')
1023                         { rule = CIPHER_SPECIAL; l++; }
1024                 else
1025                         { rule = CIPHER_ADD; }
1026
1027                 if (ITEM_SEP(ch))
1028                         {
1029                         l++;
1030                         continue;
1031                         }
1032
1033                 alg_mkey = 0;
1034                 alg_auth = 0;
1035                 alg_enc = 0;
1036                 alg_mac = 0;
1037                 alg_ssl = 0;
1038                 algo_strength = 0;
1039
1040                 start=l;
1041                 for (;;)
1042                         {
1043                         ch = *l;
1044                         buf = l;
1045                         buflen = 0;
1046 #ifndef CHARSET_EBCDIC
1047                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1048                                 ((ch >= '0') && (ch <= '9')) ||
1049                                 ((ch >= 'a') && (ch <= 'z')) ||
1050                                  (ch == '-'))
1051 #else
1052                         while ( isalnum(ch) || (ch == '-'))
1053 #endif
1054                                  {
1055                                  ch = *(++l);
1056                                  buflen++;
1057                                  }
1058
1059                         if (buflen == 0)
1060                                 {
1061                                 /*
1062                                  * We hit something we cannot deal with,
1063                                  * it is no command or separator nor
1064                                  * alphanumeric, so we call this an error.
1065                                  */
1066                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1067                                        SSL_R_INVALID_COMMAND);
1068                                 retval = found = 0;
1069                                 l++;
1070                                 break;
1071                                 }
1072
1073                         if (rule == CIPHER_SPECIAL)
1074                                 {
1075                                 found = 0; /* unused -- avoid compiler warning */
1076                                 break;  /* special treatment */
1077                                 }
1078
1079                         /* check for multi-part specification */
1080                         if (ch == '+')
1081                                 {
1082                                 multi=1;
1083                                 l++;
1084                                 }
1085                         else
1086                                 multi=0;
1087
1088                         /*
1089                          * Now search for the cipher alias in the ca_list. Be careful
1090                          * with the strncmp, because the "buflen" limitation
1091                          * will make the rule "ADH:SOME" and the cipher
1092                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1093                          * So additionally check whether the cipher name found
1094                          * has the correct length. We can save a strlen() call:
1095                          * just checking for the '\0' at the right place is
1096                          * sufficient, we have to strncmp() anyway. (We cannot
1097                          * use strcmp(), because buf is not '\0' terminated.)
1098                          */
1099                         j = found = 0;
1100                         cipher_id = 0;
1101                         while (ca_list[j])
1102                                 {
1103                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1104                                     (ca_list[j]->name[buflen] == '\0'))
1105                                         {
1106                                         found = 1;
1107                                         break;
1108                                         }
1109                                 else
1110                                         j++;
1111                                 }
1112
1113                         if (!found)
1114                                 break;  /* ignore this entry */
1115
1116                         if (ca_list[j]->algorithm_mkey)
1117                                 {
1118                                 if (alg_mkey)
1119                                         {
1120                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1121                                         if (!alg_mkey) { found = 0; break; }
1122                                         }
1123                                 else
1124                                         alg_mkey = ca_list[j]->algorithm_mkey;
1125                                 }
1126
1127                         if (ca_list[j]->algorithm_auth)
1128                                 {
1129                                 if (alg_auth)
1130                                         {
1131                                         alg_auth &= ca_list[j]->algorithm_auth;
1132                                         if (!alg_auth) { found = 0; break; }
1133                                         }
1134                                 else
1135                                         alg_auth = ca_list[j]->algorithm_auth;
1136                                 }
1137
1138                         if (ca_list[j]->algorithm_enc)
1139                                 {
1140                                 if (alg_enc)
1141                                         {
1142                                         alg_enc &= ca_list[j]->algorithm_enc;
1143                                         if (!alg_enc) { found = 0; break; }
1144                                         }
1145                                 else
1146                                         alg_enc = ca_list[j]->algorithm_enc;
1147                                 }
1148
1149                         if (ca_list[j]->algorithm_mac)
1150                                 {
1151                                 if (alg_mac)
1152                                         {
1153                                         alg_mac &= ca_list[j]->algorithm_mac;
1154                                         if (!alg_mac) { found = 0; break; }
1155                                         }
1156                                 else
1157                                         alg_mac = ca_list[j]->algorithm_mac;
1158                                 }
1159
1160                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1161                                 {
1162                                 if (algo_strength & SSL_EXP_MASK)
1163                                         {
1164                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1165                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1166                                         }
1167                                 else
1168                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1169                                 }
1170
1171                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1172                                 {
1173                                 if (algo_strength & SSL_STRONG_MASK)
1174                                         {
1175                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1176                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1177                                         }
1178                                 else
1179                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1180                                 }
1181
1182                         if (ca_list[j]->valid)
1183                                 {
1184                                 /* explicit ciphersuite found; its protocol version
1185                                  * does not become part of the search pattern!*/
1186
1187                                 cipher_id = ca_list[j]->id;
1188                                 }
1189                         else
1190                                 {
1191                                 /* not an explicit ciphersuite; only in this case, the
1192                                  * protocol version is considered part of the search pattern */
1193
1194                                 if (ca_list[j]->algorithm_ssl)
1195                                         {
1196                                         if (alg_ssl)
1197                                                 {
1198                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1199                                                 if (!alg_ssl) { found = 0; break; }
1200                                                 }
1201                                         else
1202                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1203                                         }
1204                                 }
1205
1206                         if (!multi) break;
1207                         }
1208
1209                 /*
1210                  * Ok, we have the rule, now apply it
1211                  */
1212                 if (rule == CIPHER_SPECIAL)
1213                         {       /* special command */
1214                         ok = 0;
1215                         if ((buflen == 8) &&
1216                                 !strncmp(buf, "STRENGTH", 8))
1217                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1218                         else
1219                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1220                                         SSL_R_INVALID_COMMAND);
1221                         if (ok == 0)
1222                                 retval = 0;
1223                         /*
1224                          * We do not support any "multi" options
1225                          * together with "@", so throw away the
1226                          * rest of the command, if any left, until
1227                          * end or ':' is found.
1228                          */
1229                         while ((*l != '\0') && !ITEM_SEP(*l))
1230                                 l++;
1231                         }
1232                 else if (found)
1233                         {
1234                         ssl_cipher_apply_rule(cipher_id,
1235                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1236                                 rule, -1, head_p, tail_p);
1237                         }
1238                 else
1239                         {
1240                         while ((*l != '\0') && !ITEM_SEP(*l))
1241                                 l++;
1242                         }
1243                 if (*l == '\0') break; /* done */
1244                 }
1245
1246         return(retval);
1247         }
1248
1249 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1250                 STACK_OF(SSL_CIPHER) **cipher_list,
1251                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1252                 const char *rule_str)
1253         {
1254         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1255         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1256         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1257         const char *rule_p;
1258         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1259         SSL_CIPHER **ca_list = NULL;
1260
1261         /*
1262          * Return with error if nothing to do.
1263          */
1264         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1265                 return NULL;
1266
1267         /*
1268          * To reduce the work to do we only want to process the compiled
1269          * in algorithms, so we first get the mask of disabled ciphers.
1270          */
1271         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1272
1273         /*
1274          * Now we have to collect the available ciphers from the compiled
1275          * in ciphers. We cannot get more than the number compiled in, so
1276          * it is used for allocation.
1277          */
1278         num_of_ciphers = ssl_method->num_ciphers();
1279 #ifdef KSSL_DEBUG
1280         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1281 #endif    /* KSSL_DEBUG */
1282         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1283         if (co_list == NULL)
1284                 {
1285                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1286                 return(NULL);   /* Failure */
1287                 }
1288
1289         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1290                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1291                                    co_list, &head, &tail);
1292
1293
1294         /* Now arrange all ciphers by preference: */
1295
1296         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1297         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1298         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1299
1300         /* AES is our preferred symmetric cipher */
1301         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1302
1303         /* Temporarily enable everything else for sorting */
1304         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1305
1306         /* Low priority for MD5 */
1307         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1308
1309         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1310          * (For applications that allow them, they aren't too bad, but we prefer
1311          * authenticated ciphers.) */
1312         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1313
1314         /* Move ciphers without forward secrecy to the end */
1315         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1316         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1317         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1318         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1319         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1320
1321         /* RC4 is sort-of broken -- move the the end */
1322         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1323
1324         /* Now sort by symmetric encryption strength.  The above ordering remains
1325          * in force within each class */
1326         if (!ssl_cipher_strength_sort(&head, &tail))
1327                 {
1328                 OPENSSL_free(co_list);
1329                 return NULL;
1330                 }
1331
1332         /* Now disable everything (maintaining the ordering!) */
1333         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1334
1335
1336         /*
1337          * We also need cipher aliases for selecting based on the rule_str.
1338          * There might be two types of entries in the rule_str: 1) names
1339          * of ciphers themselves 2) aliases for groups of ciphers.
1340          * For 1) we need the available ciphers and for 2) the cipher
1341          * groups of cipher_aliases added together in one list (otherwise
1342          * we would be happy with just the cipher_aliases table).
1343          */
1344         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1345         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1346         ca_list =
1347                 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1348         if (ca_list == NULL)
1349                 {
1350                 OPENSSL_free(co_list);
1351                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1352                 return(NULL);   /* Failure */
1353                 }
1354         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1355                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1356                                    head);
1357
1358         /*
1359          * If the rule_string begins with DEFAULT, apply the default rule
1360          * before using the (possibly available) additional rules.
1361          */
1362         ok = 1;
1363         rule_p = rule_str;
1364         if (strncmp(rule_str,"DEFAULT",7) == 0)
1365                 {
1366                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1367                         &head, &tail, ca_list);
1368                 rule_p += 7;
1369                 if (*rule_p == ':')
1370                         rule_p++;
1371                 }
1372
1373         if (ok && (strlen(rule_p) > 0))
1374                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1375
1376         OPENSSL_free(ca_list);  /* Not needed anymore */
1377
1378         if (!ok)
1379                 {       /* Rule processing failure */
1380                 OPENSSL_free(co_list);
1381                 return(NULL);
1382                 }
1383
1384         /*
1385          * Allocate new "cipherstack" for the result, return with error
1386          * if we cannot get one.
1387          */
1388         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1389                 {
1390                 OPENSSL_free(co_list);
1391                 return(NULL);
1392                 }
1393
1394         /*
1395          * The cipher selection for the list is done. The ciphers are added
1396          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1397          */
1398         for (curr = head; curr != NULL; curr = curr->next)
1399                 {
1400                 if (curr->active)
1401                         {
1402                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1403 #ifdef CIPHER_DEBUG
1404                         printf("<%s>\n",curr->cipher->name);
1405 #endif
1406                         }
1407                 }
1408         OPENSSL_free(co_list);  /* Not needed any longer */
1409
1410         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1411         if (tmp_cipher_list == NULL)
1412                 {
1413                 sk_SSL_CIPHER_free(cipherstack);
1414                 return NULL;
1415                 }
1416         if (*cipher_list != NULL)
1417                 sk_SSL_CIPHER_free(*cipher_list);
1418         *cipher_list = cipherstack;
1419         if (*cipher_list_by_id != NULL)
1420                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1421         *cipher_list_by_id = tmp_cipher_list;
1422         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1423
1424         return(cipherstack);
1425         }
1426
1427 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
1428         {
1429         int is_export,pkl,kl;
1430         const char *ver,*exp_str;
1431         const char *kx,*au,*enc,*mac;
1432         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2,alg_s;
1433 #ifdef KSSL_DEBUG
1434         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1435 #else
1436         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1437 #endif /* KSSL_DEBUG */
1438
1439         alg_mkey = cipher->algorithm_mkey;
1440         alg_auth = cipher->algorithm_auth;
1441         alg_enc = cipher->algorithm_enc;
1442         alg_mac = cipher->algorithm_mac;
1443         alg_ssl = cipher->algorithm_ssl;
1444
1445         alg_s=cipher->algo_strength;
1446         alg2=cipher->algorithm2;
1447
1448         is_export=SSL_C_IS_EXPORT(cipher);
1449         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1450         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1451         exp_str=is_export?" export":"";
1452
1453         if (alg_ssl & SSL_SSLV2)
1454                 ver="SSLv2";
1455         else if (alg_ssl & SSL_SSLV3)
1456                 ver="SSLv3";
1457         else
1458                 ver="unknown";
1459
1460         switch (alg_mkey)
1461                 {
1462         case SSL_kRSA:
1463                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1464                 break;
1465         case SSL_kDHr:
1466                 kx="DH/RSA";
1467                 break;
1468         case SSL_kDHd:
1469                 kx="DH/DSS";
1470                 break;
1471         case SSL_kKRB5:
1472                 kx="KRB5";
1473                 break;
1474         case SSL_kEDH:
1475                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1476                 break;
1477         case SSL_kECDHr:
1478                 kx="ECDH/RSA";
1479                 break;
1480         case SSL_kECDHe:
1481                 kx="ECDH/ECDSA";
1482                 break;
1483         case SSL_kEECDH:
1484                 kx="ECDH";
1485                 break;
1486         case SSL_kPSK:
1487                 kx="PSK";
1488                 break;
1489         default:
1490                 kx="unknown";
1491                 }
1492
1493         switch (alg_auth)
1494                 {
1495         case SSL_aRSA:
1496                 au="RSA";
1497                 break;
1498         case SSL_aDSS:
1499                 au="DSS";
1500                 break;
1501         case SSL_aDH:
1502                 au="DH";
1503                 break;
1504         case SSL_aKRB5:
1505                 au="KRB5";
1506                 break;
1507         case SSL_aECDH:
1508                 au="ECDH";
1509                 break;
1510         case SSL_aNULL:
1511                 au="None";
1512                 break;
1513         case SSL_aECDSA:
1514                 au="ECDSA";
1515                 break;
1516         case SSL_aPSK:
1517                 au="PSK";
1518                 break;
1519         default:
1520                 au="unknown";
1521                 break;
1522                 }
1523
1524         switch (alg_enc)
1525                 {
1526         case SSL_DES:
1527                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1528                 break;
1529         case SSL_3DES:
1530                 enc="3DES(168)";
1531                 break;
1532         case SSL_RC4:
1533                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1534                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1535                 break;
1536         case SSL_RC2:
1537                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1538                 break;
1539         case SSL_IDEA:
1540                 enc="IDEA(128)";
1541                 break;
1542         case SSL_eNULL:
1543                 enc="None";
1544                 break;
1545         case SSL_AES128:
1546                 enc="AES(128)";
1547                 break;
1548         case SSL_AES256:
1549                 enc="AES(256)";
1550                 break;
1551         case SSL_CAMELLIA128:
1552                 enc="Camellia(128)";
1553                 break;
1554         case SSL_CAMELLIA256:
1555                 enc="Camellia(256)";
1556                 break;
1557         case SSL_SEED:
1558                 enc="SEED(128)";
1559                 break;
1560         default:
1561                 enc="unknown";
1562                 break;
1563                 }
1564
1565         switch (alg_mac)
1566                 {
1567         case SSL_MD5:
1568                 mac="MD5";
1569                 break;
1570         case SSL_SHA1:
1571                 mac="SHA1";
1572                 break;
1573         default:
1574                 mac="unknown";
1575                 break;
1576                 }
1577
1578         if (buf == NULL)
1579                 {
1580                 len=128;
1581                 buf=OPENSSL_malloc(len);
1582                 if (buf == NULL) return("OPENSSL_malloc Error");
1583                 }
1584         else if (len < 128)
1585                 return("Buffer too small");
1586
1587 #ifdef KSSL_DEBUG
1588         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1589 #else
1590         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1591 #endif /* KSSL_DEBUG */
1592         return(buf);
1593         }
1594
1595 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1596         {
1597         int i;
1598
1599         if (c == NULL) return("(NONE)");
1600         i=(int)(c->id>>24L);
1601         if (i == 3)
1602                 return("TLSv1/SSLv3");
1603         else if (i == 2)
1604                 return("SSLv2");
1605         else
1606                 return("unknown");
1607         }
1608
1609 /* return the actual cipher being used */
1610 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1611         {
1612         if (c != NULL)
1613                 return(c->name);
1614         return("(NONE)");
1615         }
1616
1617 /* number of bits for symmetric cipher */
1618 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1619         {
1620         int ret=0;
1621
1622         if (c != NULL)
1623                 {
1624                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1625                 ret = c->strength_bits;
1626                 }
1627         return(ret);
1628         }
1629
1630 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1631         {
1632         SSL_COMP *ctmp;
1633         int i,nn;
1634
1635         if ((n == 0) || (sk == NULL)) return(NULL);
1636         nn=sk_SSL_COMP_num(sk);
1637         for (i=0; i<nn; i++)
1638                 {
1639                 ctmp=sk_SSL_COMP_value(sk,i);
1640                 if (ctmp->id == n)
1641                         return(ctmp);
1642                 }
1643         return(NULL);
1644         }
1645
1646 #ifdef OPENSSL_NO_COMP
1647 void *SSL_COMP_get_compression_methods(void)
1648         {
1649         return NULL;
1650         }
1651 int SSL_COMP_add_compression_method(int id, void *cm)
1652         {
1653         return 1;
1654         }
1655
1656 const char *SSL_COMP_get_name(const void *comp)
1657         {
1658         return NULL;
1659         }
1660 #else
1661 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1662         {
1663         load_builtin_compressions();
1664         return(ssl_comp_methods);
1665         }
1666
1667 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1668         {
1669         SSL_COMP *comp;
1670
1671         if (cm == NULL || cm->type == NID_undef)
1672                 return 1;
1673
1674         /* According to draft-ietf-tls-compression-04.txt, the
1675            compression number ranges should be the following:
1676
1677            0 to 63:    methods defined by the IETF
1678            64 to 192:  external party methods assigned by IANA
1679            193 to 255: reserved for private use */
1680         if (id < 193 || id > 255)
1681                 {
1682                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1683                 return 0;
1684                 }
1685
1686         MemCheck_off();
1687         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1688         comp->id=id;
1689         comp->method=cm;
1690         load_builtin_compressions();
1691         if (ssl_comp_methods
1692                 && !sk_SSL_COMP_find(ssl_comp_methods,comp))
1693                 {
1694                 OPENSSL_free(comp);
1695                 MemCheck_on();
1696                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1697                 return(1);
1698                 }
1699         else if ((ssl_comp_methods == NULL)
1700                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1701                 {
1702                 OPENSSL_free(comp);
1703                 MemCheck_on();
1704                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1705                 return(1);
1706                 }
1707         else
1708                 {
1709                 MemCheck_on();
1710                 return(0);
1711                 }
1712         }
1713
1714 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1715         {
1716         if (comp)
1717                 return comp->name;
1718         return NULL;
1719         }
1720
1721 #endif